Back in the day the diet option was always understood to be high protein. You could go to any restaurant and get the diet plate which was typically tuna salad or a burger patty, lettuce and tomato and cottage cheese (non-fat didn't exist back then). Maybe a small amount of fruit on the side, almost a garnish.

When I used to wait tables while I was doing my BA, there was a diet plate like that on the menu (I worked at a high-end private club that had a lot of older members). They had two sizes, and people had the option of a beef patty or tuna or salmon salad, and it came with a portion of cottage cheese, lettuce, tomato, and sliced melon.

“If I didn't define myself for myself, I would be crunched into other people's fantasies for me and eaten alive.” --Audre Lorde

Pretend to Eat Food
Now this diet is just silly. Remember when you were a child. Maybe your sister had a little tea set and you would happily eat pretend food and drink pretend tea along with her. Well, the “Air Diet” could almost be considered the grown up version of this childhood game. Pretend eaters actually cook a meal for themselves, take spoonfuls of REAL food, bring them to their mouths, and put the food back in their plates. They claim that by pretending to eat real food, they feel full and satisfied. If you do feel a little peckish in between “pretend meals”, fear not! You can snack on the recommended “water soup” which is nothing more than a bowl of water and salt...satisfying!

Stuff yourself with cotton balls to feel stuffed
If you ever wondered what it’s like to feel like a stuffed animal, then this is the diet for you. Popular among models, this diet consists of ingesting cotton balls in order to feel full and satisfied. The only problem is cotton is not meant to be digested by the human body and it can leave you feeling ill for quite some time. It’s always a good idea to add more fiber to your diet, but you might want to try eating more whole grains before turning to cotton balls.